29 Oct, 2010
13 commits
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* 'for-linus' of git://git390.marist.edu/pub/scm/linux-2.6:
[S390] fix kprobes single stepping
[S390] tape: fix dbf usage
[S390] dasd: provide a Sense Path Group ID ioctl
[S390] ftrace: select HAVE_C_RECORDMCOUNT
[S390] vdso: get rid of redefinition warnings
[S390] facility detection: remove unused variable
[S390] hypfs: Fix error handling in hypfs_diag initialization
[S390] topology: fix cpu masks for topology=off case
[S390] topology: add SCHED_MC config option
[S390] Kconfig: add machine type number to code generation options
[S390] Add z196 machine type to setup_hwcaps -
Fix kprobes after git commit 1e54622e0403891b10f2105663e0f9dd595a1f17
broke it. The kprobe_handler is now called with interrupts in the state
at the time of the breakpoint. The single step of the replaced instruction
is done with interrupts off which makes it necessary to enable and disable
the interupts in the kprobes code.Signed-off-by: Martin Schwidefsky
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The BIODASDSNID ioctl executes a 'Sense Path Group ID'
command on a DASD ECKD device. The returned path group data
allows user space programs to determine path state and
path group ID of the channel paths to the device.Signed-off-by: Stefan Weinhuber
Signed-off-by: Martin Schwidefsky -
Select HAVE_C_RECORDMCOUNT for the fast C version of recordmcount.
Signed-off-by: Heiko Carstens
Signed-off-by: Martin Schwidefsky -
The CLOCK_* defines in asm-offsets.c are only used for the vdso code
however in the meantime they cause other trouble.
Just rename them to get permanently rid of this:In file included from /home2/heicarst/linux-2.6/arch/s390/include/asm/asm-offsets.h:1:0,
from arch/s390/mm/fault.c:33:
include/generated/asm-offsets.h:53:0: warning: "CLOCK_REALTIME" redefined
include/linux/time.h:286:0: note: this is the location of the previous definition
include/generated/asm-offsets.h:54:0: warning: "CLOCK_MONOTONIC" redefined
include/linux/time.h:287:0: note: this is the location of the previous definitionSigned-off-by: Heiko Carstens
Signed-off-by: Martin Schwidefsky -
arch/s390/kernel/early.c: In function 'setup_hpage':
arch/s390/kernel/early.c:285:15: warning: unused variable 'facilities'Signed-off-by: Heiko Carstens
Signed-off-by: Martin Schwidefsky -
Fix the following two error handling bugs in hypfs_diag_init():
* No need for calling diag204_free_buffer()
* Initialize name table only in case of LPAR and prevent error message
on non-LPAR systems.Signed-off-by: Michael Holzheu
Signed-off-by: Martin Schwidefsky -
Fix cpu masks for 'topology=off' case. Folding of the scheduling domains
happen in such a way that everything belongs to the MC domain instead
of the CPU doimain.
This should fix a performance regression introduced with
eafd2b6d "[S390] topology: use default MC domain initializer" and also
makes sure we have the same behavious as if CONFIG_SCHED_MC was not
selected at all.Signed-off-by: Heiko Carstens
Signed-off-by: Martin Schwidefsky -
This allows us to easily check for performance differences seen with
!CONFIG_SCHED_MC and topology=off.
Actually there shouldn't be any (besides a small overhead because of
additional code).Signed-off-by: Heiko Carstens
Signed-off-by: Martin Schwidefsky -
Add machine type number to code generation options. Also clean up and
shorten quite a lot of help texts with respect to machine type and
architecture terminology.Signed-off-by: Heiko Carstens
Signed-off-by: Martin Schwidefsky -
Add machine type for zEnterprise 196 to elf platform detection.
Signed-off-by: Heiko Carstens
Signed-off-by: Martin Schwidefsky -
Signed-off-by: Al Viro
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* 'kconfig' of git://git.kernel.org/pub/scm/linux/kernel/git/mmarek/kbuild-2.6: (38 commits)
kbuild: convert `arch/tile' to the kconfig mainmenu upgrade
README: cite nconfig
Revert "kconfig: Temporarily disable dependency warnings"
kconfig: Use PATH_MAX instead of 128 for path buffer sizes.
kconfig: Fix realloc usage()
kconfig: Propagate const
kconfig: Don't go out from read config loop when you read new symbol
kconfig: fix menuconfig on debian lenny
kbuild: migrate all arch to the kconfig mainmenu upgrade
kconfig: expand file names
kconfig: use the file's name of sourced file
kconfig: constify file name
kconfig: don't emit warning upon rootmenu's prompt redefinition
kconfig: replace KERNELVERSION usage by the mainmenu's prompt
kconfig: delay gconf window initialization
kconfig: expand by default the rootmenu's prompt
kconfig: add a symbol string expansion helper
kconfig: regen parser
kconfig: implement the `mainmenu' directive
kconfig: allow PACKAGE to be defined on the compiler's command-line
...Fix up trivial conflict in arch/mn10300/Kconfig
28 Oct, 2010
2 commits
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The taskstats interface uses microsecond granularity for the user and
system time values. The conversion from cputime to the taskstats values
uses the cputime_to_msecs primitive which effectively limits the
granularity to milliseconds. Add the cputime_to_usecs primitive for
architectures that have better, more precise CPU time values. Remove
cputime_to_msecs primitive because there are no more users left.Signed-off-by: Michael Holzheu
Acked-by: Balbir Singh
Cc: Luck Tony
Cc: Shailabh Nagar
Cc: Martin Schwidefsky
Cc: Oleg Nesterov
Cc: Benjamin Herrenschmidt
Cc: Heiko Carstens
Cc: Thomas Gleixner
Cc: Shailabh Nagar
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds -
Fix up the arguments to arch_ptrace() to take account of the fact that
@addr and @data are now unsigned long rather than long as of a preceding
patch in this series.Signed-off-by: Namhyung Kim
Cc:
Acked-by: Roland McGrath
Acked-by: David Howells
Acked-by: Geert Uytterhoeven
Acked-by: David S. Miller
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
27 Oct, 2010
1 commit
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Since we no longer need to provide KM_type, the whole pte_*map_nested()
API is now redundant, remove it.Signed-off-by: Peter Zijlstra
Acked-by: Chris Metcalf
Cc: David Howells
Cc: Hugh Dickins
Cc: Rik van Riel
Cc: Ingo Molnar
Cc: Thomas Gleixner
Cc: "H. Peter Anvin"
Cc: Steven Rostedt
Cc: Russell King
Cc: Ralf Baechle
Cc: David Miller
Cc: Paul Mackerras
Cc: Benjamin Herrenschmidt
Signed-off-by: Andrew Morton
Signed-off-by: Linus Torvalds
25 Oct, 2010
24 commits
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Export the cpu configuration topology via sysinfo. Two new lines are
introduced:CPU Topology HW: 0 0 0 4 6 4
CPU Topology SW: 0 0 0 0 4 24The HW line describes the cpu topology nesting levels when the maximum
nesting level is used to get the corresponding SYSIB.
The SW line describes what Linux is actually using. In this case it
supports only two levels (CONFIG_SCHED_BOOK off) and therefore the
hardware folded the two lower levels in the SYSIB response block.Signed-off-by: Heiko Carstens
Signed-off-by: Martin Schwidefsky -
Move the topology sysinfo SYSIB definitions to the proper place in
asm/sysinfo.h where they should be.Signed-off-by: Heiko Carstens
Signed-off-by: Martin Schwidefsky -
Move cpu topology facility detection to early setup code where it
should be.Signed-off-by: Heiko Carstens
Signed-off-by: Martin Schwidefsky -
Store the facility list once at system startup with stfl/stfle and
reuse the result for all facility tests.Signed-off-by: Martin Schwidefsky
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Signed-off-by: FUJITA Tomonori
Cc: Heiko Carstens
Signed-off-by: Andrew Morton
Signed-off-by: Martin Schwidefsky -
Enable PFPO, floating point extension, distinct-operands,
fast-BCR-serialization, high-word, interlocked-access, load/store-
on-condition, and population-count facilities for guests.
(bits 37, 44 and 45).Signed-off-by: Christian Borntraeger
Signed-off-by: Martin Schwidefsky -
commit 050eef364ad700590a605a0749f825cab4834b1e
[S390] fix tlb flushing vs. concurrent /proc accesses
broke KVM on s390x. On every schedule a
Badness at include/asm/mmu_context.h:83 appears. s390_enable_sie
replaces the mm on the __running__ task, therefore, we have to
increase the attach count of the new mm.Signed-off-by: Christian Borntraeger
Signed-off-by: Martin Schwidefsky -
Switch default value of the kernel parameter 'topology' from off to on.
Various performance measurements have finally shown that there are no
(known) regressions anywhere.Signed-off-by: Heiko Carstens
Signed-off-by: Martin Schwidefsky -
Up to now print_cpu_info() uses the cpu address stored in it's local
lowcore to print a message to the console. The cpu address in the
lowcore is (in this case) however not the physical cpu address of the
local cpu. It's the address of the cpu that issued the sigp restart
which started the local cpu.
Fix this by using the store cpu address instruction instead.
It's not that anybody really cares since this is broken since more than
ten years...Signed-off-by: Heiko Carstens
Signed-off-by: Martin Schwidefsky -
The ieee_instruction_pointer can not be read from user space anymore
since git commit 613e1def6b52c399a8b72a5e11bc2e57d2546fb8, the ptrace
interface always returns zero. Remove it from the thread_struct. It
is still present in the user_regs_struct for compatability reasons.Signed-off-by: Martin Schwidefsky
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Do the setup of the stack overflow argument for the sixth system
call parameter right before the branch to the system call function.
That simplifies the system call parameter access code.Signed-off-by: Martin Schwidefsky
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The store-cpu-id instruction has a minimum alignment of 8. Reflect
that in the definition of struct cpuid.Signed-off-by: Martin Schwidefsky
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Read external interrupts parameters from the lowcore in the first
level interrupt handler in entry[64].S.Signed-off-by: Martin Schwidefsky
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Read all required fields for program checks from the lowcore in the
first level interrupt handler in entry[64].S. If the context that
caused the fault was enabled for interrupts we can now re-enable the
irqs in entry[64].S.Signed-off-by: Martin Schwidefsky
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All architectures besides s390 have pte_mkhuge() defined in pgtable.h.
So move the function to pgtable.h on s390 as well.
Fixes a compile error introduced with "hugetlb: hugepage migration core"
in linux-next which only happens on s390.Signed-off-by: Heiko Carstens
Signed-off-by: Martin Schwidefsky -
Raise SIGBUS with a siginfo structure. Deliver BUS_ADRERR as si_code and
the address of the fault in the si_addr field.Signed-off-by: Martin Schwidefsky
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This patch adds a notification mechanism to inform ccw drivers
about changes to channel paths, which occured while the device
is online.Signed-off-by: Sebastian Ott
Signed-off-by: Martin Schwidefsky -
When the cmm module is compiled into the kernel it will crash when
writing to the R/O data section.
Reason is the lower to upper case conversion of the "sender" module
parameter which ignored the fact that the pointer is preinitialized.Introduced with 41b42876 "cmm, smsgiucv_app: convert sender to
uppercase"Signed-off-by: Heiko Carstens
Signed-off-by: Martin Schwidefsky -
schedule() makes sure that prev != next before calling switch_to().
Therefore remove the redundant check.Signed-off-by: Heiko Carstens
Signed-off-by: Martin Schwidefsky -
If the previous task was a kernel thread there is no need to save the
contents of the fpu and access registers since they aren't used in
kernel mode.
For the same reason it is not necessary to restore these registers if
the next task is a kernel thread.Signed-off-by: Heiko Carstens
Signed-off-by: Martin Schwidefsky -
Add a kernel config option for the IBM zEnterprise 196. This will
produce faster code on newer compilers using the -march=z196 option.Signed-off-by: Heiko Carstens
Signed-off-by: Martin Schwidefsky -
Display machine capacity adjustment indicator and capacity
change reason if available in /proc/sysinfo.Signed-off-by: Heiko Carstens
Signed-off-by: Martin Schwidefsky -
Add the new instructions introduced with z196 to the kernel disassembler.
Signed-off-by: Martin Schwidefsky
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Improve performance of the sske operation by using the nonquiescing
variant if the affected page has no mappings established. On machines
with no support for the new sske variant the mask bit will be ignored.Signed-off-by: Martin Schwidefsky
